Gig at stadium for halftime show bug

[Blanchflower]

OK, my Sim got a gig for his band at the stadium. This gig is supposed to be played at the halftime show. So when my Sim plays at the stadium, the other 3 Sims in my band followed suit.

But the bug was that there was no progress at all! The progress bar was still. Even after 11:00PM, the progress bar remained still. Thus, my Sims had no choice but to leave the stadium without completing the opportunity! How can I fix this? Please help! Thanks!